CN113865163A

CN113865163A - Stainless steel liquid separator, air conditioner and manufacturing method of stainless steel liquid separator

Info

Publication number: CN113865163A
Application number: CN202111025936.6A
Authority: CN
Inventors: 斯壮伟; 章杜波
Original assignee: Zhuji Sibeida Machinery Co ltd
Current assignee: Zhuji Sibeida Machinery Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2021-12-31

Abstract

The invention provides a stainless steel liquid separator, an air conditioner and a manufacturing method of the stainless steel liquid separator. The stainless steel cylinder body is integrally formed and is in a single-end open shape, and the bottom of the stainless steel cylinder body is provided with a plurality of shunt branch pipe holes. At least one copper-based lining plate is arranged on the inner bottom surface of the stainless steel cylinder body, and each copper-based lining plate is provided with a plurality of lining plate holes. And the plurality of shunting copper branch pipes are hermetically welded in the corresponding shunting branch pipe holes and the corresponding lining plate holes by adopting phosphorus copper brazing filler metal or silver-based brazing filler metal. The soft soldering material layer is formed in an assembly gap between the copper-based lining plate and the stainless steel cylinder body, and the soft soldering material layer is formed by melting soft soldering material which is placed between the inner bottom surface of the stainless steel cylinder body and the copper-based lining plate in advance by welding heat when a plurality of shunting copper branch pipes are welded; the stainless steel end cover covers the open end of the stainless steel cylinder body and is provided with a liquid inlet pipe hole.

Description

Stainless steel liquid separator, air conditioner and manufacturing method of stainless steel liquid separator

Technical Field

The invention relates to the technical field of air conditioners, in particular to a stainless steel liquid separator, an air conditioner and a manufacturing method of the stainless steel liquid separator.

Background

The liquid separator is an important component of the refrigeration cycle system, and is disposed between the throttling device and the evaporator, and is used for uniformly and equally distributing the refrigerant flowing out of the throttling device to the branch paths of the evaporator. The existing liquid separator for the air conditioner is mostly processed by adopting a brass material or a red copper material, and the material cost is very high. On the other hand, current idle call knockout is mostly the integral type structure, and its feed liquor hole and each liquid hole adoption are with cutting, and processing technology is complicated, the processing cost is high. Although it is proposed to make the dispenser body in a split type, that is, to insert a wall plate into one end of the pipe with both ends open, and to stamp and press the wall plate into the flow dividing holes by using a stamping process, as in chinese patent CN 212619489U. However, in this structure, due to the limitation of the thickness of the plate by the stamping process, the depth of the hole in the stamped wall plate of the liquid distributor cannot guarantee the welding strength. In order to ensure the welding strength, it is also proposed to adopt a cylinder to process the shunting plug (plate), still need to adopt complex processes such as turning or drilling, and the like, and also have the problems of complex processing process, high processing cost and reduced processing efficiency.

In addition, because copper is used as a noble metal, the shortage of resources in China needs to be greatly dependent on import, and the price of copper is higher and higher with the increasingly wide application of copper, the research on the copper substitute material and the product structure is the direction of effort of a great number of engineering technicians. In engineering practice, stainless steel is proposed to replace the existing copper material, but the stainless steel material cannot be welded with a phosphor copper welding material when being welded with a copper pipe in a refrigeration system, and if brazing is carried out by adopting the brass brazing material, the melting point of the welding material is greatly improved, so that the welding difficulty and the leakage hidden trouble can be greatly improved.

Disclosure of Invention

The invention provides a stainless steel liquid separator, an air conditioner and a manufacturing method of the stainless steel liquid separator, aiming at overcoming at least one defect in the prior art.

In order to achieve the purpose, the stainless steel liquid separator provided by the invention comprises a stainless steel cylinder body, at least one copper-based lining plate, a plurality of branch copper pipes and a stainless steel end cover. The stainless steel cylinder body is integrally formed and is in a single-end open shape, and the bottom of the stainless steel cylinder body is provided with a plurality of shunt branch pipe holes. At least one copper-based lining plate is arranged on the inner bottom surface of the stainless steel cylinder body, and each copper-based lining plate is provided with a plurality of lining plate holes corresponding to the plurality of shunt branch pipe holes. A plurality of reposition of redundant personnel copper branch pipes stretch into respectively that each reposition of redundant personnel is downthehole and stretch into the end and extend to corresponding welt downthehole, and a plurality of reposition of redundant personnel copper branch pipes adopt phosphorus copper brazing filler metal or silver-based brazing filler metal seal welding in corresponding reposition of redundant personnel pipe hole and welt are downthehole. The soft brazing material layer is formed by melting soft brazing materials which are placed between the inner bottom surface of the stainless steel cylinder and the copper-based lining plate in advance by welding heat when the plurality of shunt copper branch pipes are welded. The stainless steel end cover covers the open end of the stainless steel cylinder and is welded with the stainless steel cylinder in a sealing way, and the stainless steel end cover is provided with a liquid inlet pipe hole.

According to an embodiment of the invention, the stainless steel liquid separator further comprises a mixing guide plate, the mixing guide plate is arranged in a liquid separator inner cavity formed by hermetically welding a stainless steel cylinder body and a stainless steel end cover, a concave cavity part is arranged on the mixing guide plate, a first mixing cavity is formed in the concave cavity part, a second mixing cavity is formed between the mixing guide plate and a copper-based lining plate, and a plurality of throttling guide holes communicating the first mixing cavity with the second mixing cavity are uniformly distributed on the mixing guide plate along the circumferential direction; the concave cavity part enables two-phase refrigerant entering the first mixing cavity to flow back along the first mixing cavity after being mixed, then the refrigerant reaches the second mixing cavity through the throttling and flow guiding hole, and the liquid inlet pipe hole on the stainless steel end cover is opposite to the first mixing cavity.

According to an embodiment of the invention, the stainless steel liquid separator further comprises a liquid inlet pipe welded to the hole of the liquid inlet pipe, the output end of the liquid inlet pipe extends into the first mixing cavity, and the distance between the end surface of the output end of the liquid inlet pipe and the opening end surface of the first mixing cavity is less than or equal to 1 time of the outer diameter of the liquid inlet pipe; or the output end face of the liquid inlet pipe is positioned outside the first mixing cavity, and the distance between the output end face of the liquid inlet pipe and the opening end face of the first mixing cavity is less than or equal to 0.8 times of the outer diameter of the liquid inlet pipe.

According to an embodiment of the present invention, when the liquid inlet pipe is a stainless steel pipe or a carbon steel pipe, the stainless steel liquid separator further includes a copper sleeve connecting pipe sleeved at the end of the liquid inlet pipe, the copper sleeve connecting pipe is sleeved in the copper sleeve connecting pipe, the length of the overlapping region formed by the copper pipe, the copper sleeve connecting pipe and the liquid inlet pipe is L1, the sleeved length of the copper pipe and the copper sleeve connecting pipe is L0, the sleeved length of the copper sleeve connecting pipe and the liquid inlet pipe is L2, the sleeved length of the copper sleeve connecting pipe and the liquid inlet pipe is L1 or more and less than 0.2L0 or less than 0.8L0, and the sleeved length of the copper sleeve connecting pipe and the liquid inlet pipe is L1 or less than 0.8L2 or more than 0.2L2 or more than 0.8L 3.

According to an embodiment of the present invention, when the liquid inlet pipe is a copper pipe, the liquid inlet pipe is sleeved in the circumferential flanging part of the liquid inlet pipe hole, the pipeline copper pipe is sleeved in the liquid inlet pipe, the length of the three sleeved overlapping regions formed by the pipeline copper pipe, the liquid inlet pipe and the flanging part is L1 ', the sleeved length of the pipeline copper pipe and the liquid inlet pipe is L0 ', and the sleeved length of the liquid inlet pipe and the flanging part is L2 ', 0.2L0 ' is not less than L1 ' and not more than 0.8L0 ', and 0.2L2 ' is not less than L1 ' and not more than 0.8L2 '.

According to an embodiment of the present invention, the plurality of throttling guide holes uniformly distributed along the circumferential direction of the mixing guide plate are groove holes, through holes, or a combination of through holes and groove holes; the groove hole is formed by the surrounding of the openings of two curved surface stretching parts which are positioned at the two sides of the mixing guide plate and are centrosymmetric.

According to one embodiment of the invention, the mixing guide plate comprises a plate body and a cavity part which is formed in the center of the plate body and extends towards the bottom of the stainless steel cylinder, a first mixing cavity is formed in the cavity part, and a transmission channel is formed between the plate body and the end cover.

According to an embodiment of the invention, the inner side wall of the stainless steel cylinder is provided with a limit fixing part which protrudes towards the inside of the stainless steel cylinder, the limit fixing part limits and fixes the copper-based lining plate on the inner bottom surface of the stainless steel cylinder, and the limit fixing part comprises a plurality of point-shaped limit fixing parts, a plurality of sections of circular arc limit fixing parts or a circular ring limit fixing part; or at least one copper-based lining plate is assembled on the inner bottom surface of the stainless steel cylinder body in an interference manner.

According to an embodiment of the invention, the copper-based lining plate is also provided with a through hole which is positioned in a circumferential central line formed by the lining plate holes; when the number of the copper-based lining plates is multiple, the copper-based lining plates are overlapped on the inner bottom surface of the stainless steel cylinder body, and the through holes on the copper-based lining plates are correspondingly overlapped to form a concave cavity.

According to one embodiment of the invention, the stainless steel end cover outer sleeve or the stainless steel end cover inner sleeve covers the open end of the stainless steel cylinder, and the joint of the stainless steel end cover outer sleeve and the open end of the stainless steel cylinder is hermetically welded to form an inner cavity of the liquid distributor; the stainless steel end cover is provided with a flanging part facing the inside or the outside of the stainless steel cylinder body in the circumferential direction of the liquid inlet pipe hole.

On the other hand, the invention also provides an air conditioner which is characterized by comprising a throttling device, an evaporator and the stainless steel liquid separator, wherein a liquid inlet pipe hole of the stainless steel liquid separator is communicated with the throttling device, and a plurality of branch copper pipes of the stainless steel liquid separator are communicated with the evaporator.

On the other hand, the invention also provides a manufacturing method of the stainless steel liquid separator, which is characterized in that the stainless steel liquid separator comprises a stainless steel cylinder, at least one copper-based lining plate, a plurality of branch copper pipes and a stainless steel end cover; the manufacturing method of the stainless steel liquid distributor comprises the following steps:

step S10, soft soldering material is put into the inner bottom surface of the stainless steel cylinder body which is integrally formed and has a single-end opening shape, and the bottom of the stainless steel cylinder body is provided with a plurality of shunt branch pipe holes;

step S20, at least one copper-based lining plate is pressed into a stainless steel cylinder, and each copper-based lining plate is provided with a plurality of lining plate holes corresponding to the plurality of shunt branch pipe holes;

step S30, fixing at least one copper-based lining plate and a stainless steel cylinder body which are pressed and mounted in a dotting or grooving mode;

step S40, sleeving and pressing the stainless steel end cover on the open end of the stainless steel cylinder and sealing and welding the stainless steel end cover and the open end of the stainless steel cylinder, and forming an inner cavity of the liquid distributor after the stainless steel end cover and the open end are sealed and welded;

step S50, pressing each shunt copper branch pipe into a shunt branch pipe hole at the bottom of the stainless steel cylinder body and extending into a corresponding lining plate hole; then, adopting phosphorus copper solder or silver-based solder for welding; meanwhile, the soldering heat melts the soft soldering material between the copper-based lining plate and the stainless steel cylinder body to form a soft soldering material layer for filling the assembly gap between the copper-based lining plate and the stainless steel cylinder body.

On the other hand, the invention also provides a manufacturing method of the stainless steel liquid separator, which is characterized in that the stainless steel liquid separator comprises a stainless steel cylinder, at least one copper-based lining plate, a plurality of shunting copper branch pipes, a stainless steel end cover and a mixing guide plate; the manufacturing method of the stainless steel liquid distributor comprises the following steps:

step S10', soft soldering material is put into the inner bottom surface of the stainless steel cylinder which is integrally formed and has a single-end opening shape, and the bottom of the stainless steel cylinder is provided with a plurality of shunt branch pipe holes;

step S20', at least one copper-based lining plate is pressed into a stainless steel cylinder, and each copper-based lining plate is provided with a plurality of lining plate holes corresponding to the plurality of shunt branch pipe holes;

step S30', fixing at least one copper-based lining plate and a stainless steel cylinder in a dotting or grooving manner;

step S40', fixing the mixed guide plate on the stainless steel cylinder or the stainless steel end cover;

step S50', sleeving and pressing a stainless steel end cover on the open end of a stainless steel cylinder and sealing and welding the stainless steel end cover and the open end of the stainless steel cylinder, forming an inner cavity of the liquid distributor after sealing and welding the stainless steel end cover and the open end of the stainless steel cylinder, and dividing the inner cavity of the liquid distributor into a first mixing cavity and a second mixing cavity by a mixing guide plate which is positioned in the inner cavity of the liquid distributor;

step S60', each shunt copper branch pipe is pressed in a shunt branch pipe hole at the bottom of the stainless steel cylinder body and extends into a corresponding lining plate hole; then, adopting phosphorus copper solder or silver-based solder for welding; meanwhile, the soldering heat melts the soft soldering material between the copper-based lining plate and the stainless steel cylinder body to form a soft soldering material layer for filling the assembly gap between the copper-based lining plate and the stainless steel cylinder body.

In summary, the stainless steel liquid separator provided by the invention is of a combined structure, the cylinder body and the end cover are both made of stainless steel materials, and the stainless steel cylinder body can be formed integrally by a simple process. Compare current copper knockout, this setting not only greatly reduced the material cost and the manufacturing cost of knockout, also greatly simplified manufacturing procedure simultaneously, improved machining efficiency. At least one copper-based lining plate arranged at the bottom of the stainless steel cylinder body provides enough insertion depth for welding between the shunt copper branch pipe and the stainless steel cylinder body, and meets the welding requirement. Further, before assembling the copper-based backing plate, solder is placed on the inner bottom surface of the stainless steel cylinder in advance and the solder is melted by the heat of the divided copper branch pipe to form a solder layer filling the gap between the copper-based backing plate and the stainless steel cylinder. This setting ensures the welding leakproofness and the welding strength between stainless steel cylinder and the reposition of redundant personnel copper branch pipe, provides the condition for adopting low-cost phosphorus copper to braze between stainless steel cylinder and the reposition of redundant personnel copper branch pipe to the manufacturing cost of product has further been reduced.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural diagram of a stainless steel liquid distributor according to an embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3A is a schematic structural diagram of the stainless steel cylinder in fig. 1.

Fig. 3B is a schematic structural diagram of fig. 3A from another viewing angle.

Fig. 4 is a schematic structural view of the copper-based backing plate of fig. 1.

Fig. 5 is a schematic structural view of the stainless steel end cap of fig. 1.

Fig. 6 is a block diagram illustrating steps of a method for manufacturing a stainless steel dispenser according to an embodiment of the present invention.

Fig. 7 is a schematic flow chart illustrating the manufacturing process of the product corresponding to fig. 6.

Fig. 8A is a schematic diagram of a product of a solution formed by assembling a stainless steel cylinder, a copper-based lining plate, and a branched copper pipe in a stainless steel dispenser according to an embodiment.

FIG. 8B is a schematic structural diagram of a product of protocol two in a comparative experiment.

FIG. 9 is a schematic diagram of leak analysis of a sample in which a leak occurred in the second protocol.

FIG. 10A is a schematic view of a force analysis of a product according to protocol one.

FIG. 10B is a schematic view of the stress analysis of the product of scheme two.

Fig. 11A to 11E are schematic structural views illustrating a stainless steel dispenser according to another embodiment of the present invention.

Fig. 12 is a schematic diagram of an air conditioner according to an embodiment of the present invention.

Fig. 13 is a schematic structural view of a stainless steel liquid separator according to a second embodiment of the present invention.

Fig. 14 is an enlarged schematic view of fig. 13 at B.

Fig. 15 is a block diagram illustrating steps of a method for manufacturing a stainless steel dispenser according to a second embodiment of the present invention.

Fig. 16 is a schematic flow chart illustrating the manufacture of the product corresponding to fig. 15.

Fig. 17 is a schematic diagram illustrating a trend of a partial refrigerant in fig. 13.

Fig. 18A is a schematic view of a mixing baffle in the stainless steel dispenser of fig. 13.

Fig. 18B is a schematic cross-sectional view of fig. 18A.

Fig. 19A is a schematic diagram of a mixing baffle in a stainless steel dispenser according to another embodiment of the present invention.

Fig. 19B is a schematic cross-sectional view of fig. 19A.

Fig. 20A is a schematic structural view of a mixing baffle in a stainless steel liquid separator according to another embodiment of the present invention.

FIG. 20B is a schematic cross-sectional view taken along line C-C of FIG. 20A.

Fig. 20C is a schematic structural view of a stainless steel liquid separator according to another embodiment of the present invention.

Fig. 21 is a schematic structural view of a stainless steel liquid separator according to another embodiment of the present invention.

Fig. 22 is a schematic structural view of a stainless steel liquid separator according to a third embodiment of the present invention.

Fig. 22A is an enlarged schematic view of fig. 22 at D.

Fig. 23 is a schematic structural view of a stainless steel liquid separator according to a fourth embodiment of the present invention.

Fig. 23A is an enlarged schematic view at E in fig. 23.

Detailed Description

As shown in fig. 1 to 5, the stainless steel liquid distributor provided by the present embodiment comprises a stainless steel cylinder 1, at least one copper-based liner plate 2, a plurality of branch copper pipes 3, a solder layer 103, and a stainless steel end cap 4. The stainless steel cylinder 1 is integrally formed and has a single-end opening shape, and the bottom of the stainless steel cylinder 1 is provided with a plurality of shunt branch pipe holes 11. At least one copper-based lining plate 2 is arranged on the inner bottom surface of the stainless steel cylinder body 1, and each copper-based lining plate 2 is provided with a plurality of lining plate holes 21 corresponding to the plurality of shunt branch pipe holes 11. The plurality of shunt copper branch pipes 3 respectively extend into the shunt branch pipe holes 11 and extend into the end extending to the corresponding lining plate hole 21, and the plurality of shunt copper branch pipes 3 are hermetically welded in the corresponding shunt branch pipe holes 11 and the corresponding lining plate hole 21 by adopting phosphorus copper brazing filler metal or silver-based brazing filler metal. The solder layer 103 is provided in the fitting gap between the copper-based backing plate 2 and the stainless steel cylindrical body 1, and the solder layer 103 is formed by melting solder placed in advance between the inner bottom surface of the stainless steel cylindrical body 1 and the copper-based backing plate 2 by the heat of welding when the plurality of branch copper pipes 3 are welded. The stainless steel end cover 4 covers the open end of the stainless steel cylinder 1 and is welded with the stainless steel cylinder 1 in a sealing way, and the stainless steel end cover 4 is provided with a liquid inlet pipe hole 41.

Here, the soft solder refers to a solder having a melting point of less than 450 ℃.

In the present embodiment, the number of the copper-based backing plates 2 is one. However, the present invention is not limited to this. In other embodiments, as shown in fig. 11C, 11D and 11E, the number of the copper-based backing plates 2 may be two or more.

In this embodiment, the stainless steel liquid separator further includes a liquid inlet pipe 6, and the liquid inlet pipe 6 is welded to the liquid inlet pipe hole 41 on the stainless steel end cover in a sealing manner. However, the present invention is not limited thereto. In other embodiments, the stainless steel liquid separator may not include a liquid inlet pipe, and the liquid inlet pipe hole on the stainless steel end cap is directly connected to the external air conditioning pipeline.

Fig. 6 and 7 are block diagrams of steps of a method for manufacturing a stainless steel dispenser according to this embodiment and a flow chart of a corresponding product. The stainless steel dispenser and the method for manufacturing the same according to the present embodiment will be described in detail with reference to fig. 6 and 7. The method for manufacturing the stainless steel liquid separator provided by the embodiment comprises the following steps:

in step S10, a soft solder is put on the inner bottom surface of the integrally formed stainless steel cylindrical body 1 having an open single end. The soft solder can be tin-lead solder with melting point lower than 450 deg.C or lead-free solder. However, the present invention is not limited thereto.

Step S20, pressing the copper-based lining plate 2 into the stainless steel cylinder body 1;

step S30, forming a circular ring limit fixing part 12 on the side wall of the stainless steel cylinder body 1 in a grooving mode, and fixing the copper-based lining plate 2 and the stainless steel cylinder body 1 which are pressed and mounted by the circular ring limit fixing part 12. However, the fixing manner of the copper-based backing plate is not limited in any way in the present invention. In other embodiments, a dotted limit fixing portion or a multi-segment arc limit fixing portion may also be formed on the sidewall of the stainless steel cylinder by dotting or partially notching. Alternatively, in other embodiments, the copper-based liner plate may be interference fit to the stainless steel cylinder.

And step S40, sleeving and pressing the stainless steel end cover 4 at the open end of the stainless steel cylinder body 1, and hermetically welding the stainless steel end cover and the open end of the stainless steel cylinder body by adopting resistance welding to form an inner cavity of the liquid distributor. However, the welding mode between the stainless steel end cover and the stainless steel cylinder body is not limited in any way in the invention. In other embodiments, the two can also adopt other self-fusion welding sealing welding such as argon arc welding, laser welding and the like; or adding welding wires on the basis of self-welding.

Step S50, pressing each shunt copper branch pipe 3 into the shunt branch pipe hole 11 at the bottom of the stainless steel cylinder 1 and extending into the corresponding lining plate hole 12; and then, welding is carried out by adopting phosphor copper brazing filler metal, a first welding seam 101 is formed between the shunt copper branch pipe 3 and the shunt branch pipe hole 11, and a second welding seam 102 is formed between the shunt copper branch pipe 3 and the lining plate hole 2. At the same time, the heat of welding at the time of welding the plurality of divided copper branch pipes 3 melts the solder between the copper-based backing plate 2 and the stainless steel cylindrical body 1, thereby forming a solder layer 103 therebetween. However, the present invention is not limited thereto. In other embodiments, the welding of the shunt copper branch pipe can also adopt silver-based solder; but the price of silver-based solders will be higher than that of phosphor-copper solders. Specifically, in the welding in step S50, the melting points of the phosphor copper solder and the silver-based solder are both high, and for example, the melting point of the phosphor copper solder can reach 650 degrees celsius or higher, the melting point of the silver-based solder can reach 600 degrees celsius or higher, and both the melting points are much higher than the melting point of the solder (450 degrees celsius). Therefore, when a plurality of branch copper pipes 3 are soldered, the soldering heat is transferred to the solder, and the solder is simultaneously melted to form the solder layer 103. In other embodiments, when the number of the copper-based substrate plates is plural, the solder melted by heat may penetrate into the gap between two adjacent copper-based substrate plates.

And step S60, sleeving the liquid inlet pipe 6 in the liquid inlet pipe hole 41 of the stainless steel end cover and performing brazing connection.

In the stainless steel liquid separator provided by the embodiment, the product structure and the design of the manufacturing method jointly realize the purpose of ensuring the product performance of the liquid separator, greatly reducing the material cost and the manufacturing cost of the liquid separator, greatly simplifying the manufacturing process and improving the production efficiency. The following will be described in detail with reference to fig. 1 to 7.

First, on the product structure. The body part of the stainless steel liquid separator provided by this embodiment is a combined structure formed by a stainless steel cylinder 1, a copper-based lining plate 2 and a stainless steel end cover 4. The arrangement enables the stainless steel cylinder body 1 to be integrally formed by stretching a thin-wall plate, the bottom of the stainless steel cylinder body 1 is thin, and the requirements of a punching process can be well met, so that a plurality of shunt branch pipe holes 11 can be formed at the bottom of the stainless steel cylinder body 1 by adopting the punching process. Compared with the existing liquid distributor body manufactured by adopting a turning process, the drawing process and the stamping process have the advantages of simpler manufacturing procedure, lower processing cost and higher processing efficiency. However, the present invention does not limit the forming manner of the stainless steel cylinder. In other embodiments, the stainless steel cylinder may be formed by other integral forming processes, such as casting.

The thickness of the bottom of the stainless steel cylinder 1 can not meet the requirement of the insertion depth of the shunt copper branch pipe simultaneously when the stretching and stamping processes are met. In order to solve this problem, in the present embodiment, at least one copper-based liner plate 2 is disposed on the inner bottom surface of the stainless steel cylinder 1, and each copper-based liner plate 2 has a plurality of liner plate holes 21 coaxially corresponding to the plurality of branch pipe holes 11. The superposition of the hole depth H1 of the shunt branch pipe hole and the hole depth H2 of the lining hole provides enough depth for the insertion of the shunt copper branch pipe 3, the insertion depth requirement of the shunt copper branch pipe 3 during welding is ensured, and the welding strength of the shunt copper branch pipe 3 is jointly borne by the hole depth H1 of the shunt branch pipe hole and the hole depth H2 of the lining hole, so that the welding connection strength is greatly improved. Specifically, in the field of air conditioning, in order to ensure the welding strength, the superposed thickness of the hole depth H1 of the shunt branch pipe hole and the hole depth H2 of the liner plate hole is set to be greater than or equal to 2.5 mm. Preferably, the sum of the pore depths of the two superimposed is 5 mm. However, the present invention is not limited thereto. In other embodiments, the sum of the hole depths of the two superimposed can be other values greater than 2.5 mm.

In this embodiment, the stainless steel cylinder 1 is a single-end open structure integrally formed by a drawing process, the inner bottom surface and the peripheral wall of the stainless steel cylinder 1 completely cover the contact end surface and the peripheral wall of the copper-based lining plate 2, and the copper-based lining plate 2 and the stainless steel cylinder 1 form an integral structure through a brazing solder layer 103, so that the stainless steel cylinder has strong tensile strength; the copper-based lining plate 2 can not be separated from the inner bottom surface of the stainless steel cylinder body 1 in the welding or using process.

Fig. 8A is a schematic view illustrating a product (hereinafter referred to as a first solution product) formed by assembling a stainless steel cylinder, a copper-based lining plate and a shunt copper branch pipe in the stainless steel dispenser according to this embodiment; fig. 8B is a schematic structural diagram of a comparative test product (hereinafter referred to as solution two product), in which reference numerals in fig. 8B, 9 and 10B denote a stainless steel cylinder 100, a copper-based lining plate 200 and a branched copper pipe 300. The weld strength of the product under both schemes of fig. 8A and 8B was compared under the same test conditions.

1. Test conditions

Test product specification

Specification of parts: the size of the lining plate is as follows: phi 35 (outer diameter) × 2 (wall thickness) mm; barrel: phi 35 (inner diameter) 0.7 (wall thickness) mm; shunting copper branch pipes: phi 7 (outer diameter) 0.6 (wall thickness) mm; three parts were assembled to each other under the same conditions as shown in fig. 8A and 8B, respectively, to form an assembly, respectively, a case one product and a case two product.

Testing equipment: adopting an SPD-20KN welding strength tensile testing machine and an SPD-QM airtightness inspection machine;

③ the test process: and clamping the cylinder body of the test product and one of the branch copper pipes by an SPD-20KN welding strength tensile testing machine, applying an acting force in the opposite direction by the tensile testing machine, gradually stretching the load to 300N and keeping the load for 5min, and observing the condition of the welding part of the product.

Judging standard: and (3) detecting the air tightness of a tensile test product, filling 4.15MPa of gas into the product, maintaining the pressure for 1min, and observing a welding part by water detection to ensure that no leakage exists.

The number of the tested products is: each of the plan one product and the plan two product is selected 20 and numbered.

2. Test results

As shown in the following table, leaks are identified as NG; no leakage is identified by OK.

Scheme(s)

1#

2#

3#

4#

5#

6#

7#

8#

9#

10#

Scheme one

OK

Scheme two

NG

OK

NG

OK

NG

Scheme(s)

11#

12#

13#

14#

15#

16#

17#

18#

19#

20#

Scheme one

OK

Scheme two

NG

OK

NG

OK

NG

3. Statistics of percent of pass

Scheme(s)	Percent of pass
		Scheme one	100％
Scheme two	30％

4. Analysis of test results

The results of the above-described tests will be analyzed with reference to fig. 9, 10A, and 10B. Wherein FIG. 9 is a schematic diagram of leak analysis of a leak sample in scenario two. FIG. 10A is a schematic view of a force analysis of a product according to protocol one; FIG. 10B is a schematic view of the stress analysis of the product of scheme two; in fig. 10A and 10B, F is the force applied to the branched copper pipe by the tensile testing machine.

Leakage site analysis

As shown in fig. 9, when the leakage portions (bubble emergence points) of all the leakage samples in the second embodiment were observed, bubbles were released from the gaps (e.g., K2 in fig. 9) where the outer bottom surface of the stainless steel cylinder 100 was joined to the copper-based backing plate 200. It can be concluded that gas seeps out after entering the cracked weld joint (e.g. at K1 in fig. 9) between the split copper manifold 300 and the manifold hole from the inside of the stainless steel cylinder 100, that is, the weld joint at K1 is cracked, so that the welding sealing effect of the product is lost; the leakage path of the gas is shown by the arrows in fig. 9.

Analysis of weld Strength and leakage

As shown in fig. 10A and fig. 2, in the product of the first proposal, the copper-based lining plate 2 is arranged inside the stainless steel cylinder body 1, and the three parts are combined into a whole by welding the branch copper pipes 3. In this case, when the branch copper pipe is under the action of external tension, the strength of the branch copper pipe is supported at three positions; respectively as follows: the welding strength F11 of the first welding seam 101, the welding strength F12 of the second welding seam 102 and the supporting force F13 of the copper-based lining plate 2 applied to the bottom of the cylinder body 1 after being stressed are also included.

In the product of the second inverse scheme, as shown in fig. 10B, since the copper-based liner plate 200 is outside the stainless steel cylinder 100, the welding combination is not actually integrated, so that in this case, when the branch copper pipe 300 is subjected to an external pulling force, the strength thereof is supported by only one place, namely, the welding strength F21 of the welding seam between the branch copper pipe 300 and the branch pipe hole, and the welding strength F21 of the welding seam is affected by the thin wall of the cylinder (i.e., the hole depth of the branch pipe hole is shallow), and the welding seam (i.e., K1 in fig. 9) is broken first when the branch copper pipe pulling force is applied.

From the above test data and result analysis, it can be proved that the copper-based lining plate 2 in the stainless steel liquid separator provided by this embodiment is arranged in the stainless steel cylinder 1, so that the welding connection strength of the shunt copper branch pipe 3 is greatly improved.

In the embodiment, the stainless steel cylinder 1 is integrally formed by stretching a thin-wall plate, and the bottom of the stretched stainless steel cylinder 1 meets the requirement of a stamping process, so that the shunt branch pipe hole 11 can be formed by adopting the stamping process; similarly, the copper-based lining plate 2 arranged on the inner bottom surface of the stainless steel cylinder also supports the lining plate hole 21 manufactured by adopting a punching process. On one hand, compared with a turning process, the stamping process is simple, efficient and low in cost, and the problem of difficulty in machining of the existing liquid distributor is well solved. On the other hand, the arrangement of the copper-based lining plate 2 also realizes the effect of prolonging the insertion depth of the shunt copper branch pipe 3, and ensures the welding strength and stability.

It should be noted that, in addition to the processing efficiency and the welding strength, the present embodiment has the following advantages over the existing split-type liquid distributor. Specifically, as described above, the wall plate embedded in one end of the double-end open pipe in the existing split-type liquid distributor structure needs to be welded on the double-end open pipe in a girth welding sealing mode. But because the area of wallboard is very little and its upper surface distributes and has a plurality of reposition of redundant personnel holes, this leads to reposition of redundant personnel hole to be very little apart from the distance of wallboard periphery, and the welding of wallboard girth welding and reposition of redundant personnel copper branch pipe can influence each other, and the heat during welding transmits each other to lead to the secondary melting to appear in the position that has welded well, thereby seriously influence the performance of welding, greatly increased the risk of leaking. However, in the present embodiment, the bottom and the side wall of the stainless steel cylinder 1 are integrally formed by stretching, and the circumferential direction of the two is not required to be welded; although the stainless steel end cover 4 and the stainless steel cylinder 1 need to be connected by welding, the stainless steel end cover 4 is far away from the bottom of the stainless steel cylinder 1, so that the influence of welding during secondary welding can be avoided; not only greatly convenient a plurality of reposition of redundant personnel copper branch pipes 3's synchronous weld, also ensured the stability of a plurality of reposition of redundant personnel copper branch pipes 3 after welding simultaneously.

Secondly, in the manufacturing process.

In this embodiment, before the copper base backing plate 2 is assembled, the solder is placed in the stainless steel cylindrical body 1 in advance in step S10. The soldering material is melted by the heat of welding at the same time when the plurality of branch copper pipes 3 are welded to form the first welding line 101 and the second welding line 102 at step S50. The molten solder fills the gap between the bottom of the stainless steel cylinder 1 and the copper-based backing plate 2 to form a solder layer 103. First weld 102 and second weld 102 effect a seal of one of the leak paths; the first weld 102 and the solder layer 103, however, provide a seal for the other leak path, i.e., two welds per leak path to ensure weld tightness and weld strength.

Furthermore, in the welding process, as the phosphorus-copper brazing between the stainless steel material and the copper material can generate a phosphorus-containing brittle substance which influences the welding strength, the stainless steel material and the copper material are difficult to be welded by adopting a low-cost and low-melting-point phosphorus-copper solder; only brass brazing solder with high melting point can be selected for welding, which brings great difficulty to the welding of stainless steel materials. However, in this embodiment, the provision of the double weld in each leakage path also provides conditions for the branch copper pipes 3 to be brazed by using low-melting-point and low-cost phosphor-copper, thereby further reducing the manufacturing cost and difficulty of the stainless steel liquid separator. However, the present invention is not limited thereto. In other embodiments, the manifold can also be soldered using silver-based brazing.

Specifically, when the branch flow copper pipe 3 is welded, the branch flow copper pipe 3 and the copper-based lining plate 2 are both made of copper materials, and a second weld 102 formed between the branch flow copper pipe 3 and the lining plate hole 21 by phosphorus copper brazing has very stable welding airtightness and welding strength. The welding between the shunt copper branch pipe 3 and the shunt pipe hole 11 is copper and stainless steel welding, and phosphorus copper brazing forms a brittle intermetallic compound containing phosphorus which affects the welding strength when forming the first weld 101, thereby weakening the stability of the first weld 101 to a certain extent. In this embodiment, the second weld 102 and the solder layer 103 in direct contact with the inner cavity of the dispenser substantially reduce the pressure of the refrigerant on the first weld 101, reducing the pressure-bearing requirement of the first weld 101. Further, in the limit state, even if the first welding seam 101 is partially failed due to corrosion, the second welding seam 102 and the soft solder layer 103 can ensure the welding tightness and the welding strength of the branch copper pipe 3, thereby ensuring the normal operation of the stainless steel liquid distributor. Furthermore, the phosphorus-copper brazing filler metal has good fluidity, and when the shunting copper branch pipes 3 are welded, synchronous welding of the plurality of shunting copper branch pipes 3 can be realized, so that the welding efficiency is greatly improved. In addition, the stainless steel cylinder body 1 and the stainless steel end cover 4 are made of the same material, which greatly facilitates the welding between the two.

In summary, the stainless steel liquid distributor and the manufacturing method thereof provided by the present embodiment have the combined structure, so that each component can be processed independently, and the processing technology can adopt a simple and low-cost technology supporting the stainless steel material drawing and stamping technology. In assembly welding, the copper-based backing plate 2 and the solder are arranged so that a first weld 101, a second weld 102 and a solder layer 103 are formed among the stainless steel cylinder 1, the branched copper pipe 3 and the copper-based backing plate 2. The second welding seam 102 with high strength and the soft soldering material layer 103 weaken the strength requirement of the first welding seam 101, so that the stainless steel cylinder 1 and the shunt copper branch pipe 3 (forming the first welding seam 101 between the two) can be welded by adopting low-melting-point and low-cost phosphor-copper welding materials, and the welding difficulty of the stainless steel materials is greatly reduced while the welding tightness is ensured. That is, the stainless steel liquid distributor and the manufacturing method thereof provided by the embodiment provide conditions for manufacturing the main components of the liquid distributor from material processing and assembly welding by using the stainless steel material, so that the expensive copper material can be replaced by using the stainless steel material, and the cost of the liquid distributor is greatly reduced.

In this embodiment, as shown in fig. 4, the copper-based backing plate 2 further has a through hole 22, and the through hole 22 is located in the circumferential center line S formed by the plurality of backing plate holes 21. The arrangement of the through holes 22 ensures the strength of the copper-based lining plate 2 and further reduces the material cost of the copper-based lining plate 2. Preferably, six shunt branch pipe holes 11 are uniformly distributed along the circumferential direction of the stainless steel cylinder 1, six liner plate holes 21 are arranged corresponding to the six shunt branch pipe holes 11, and the through hole 22 is located in a circumferential center line S formed by the six liner plate holes 21. However, the present invention is not limited in any way as to the number of manifold apertures. In other embodiments, the number of manifold apertures may be adjusted according to the requirements of the air conditioning system pipeline.

In actual operation, the liquid separator often has the phenomenon that gas-liquid two-phase mixing is uneven, the flow of refrigerant entering each shunting copper branch pipe is uneven, and the like, so that the heat exchange performance of an evaporator is influenced, and the working performance of the whole refrigeration system is further influenced. For this reason, in another embodiment, as shown in fig. 11D, when there are a plurality of copper-based lining plates 2, a plurality of copper-based lining plates 2 are overlapped on the inner bottom surface of the stainless steel cylinder 1, and the through holes 22 on the plurality of copper-based lining plates are correspondingly overlapped to form the cavity 20. The gas-liquid mixed two-phase refrigerant output by the liquid inlet pipe 6 partially enters the concave cavity 20, flows back after being reflected by the bottom and the side wall of the concave cavity 20, and continuously collides with the refrigerant in the stainless steel cylinder 1, so that the mixing uniformity of the refrigerant in the stainless steel cylinder 1 is improved. In fig. 11D, the cavity 20 is opposite to the liquid inlet hole 41 on the stainless steel end cover, and the through holes on the copper-based lining plates 2 in all layers have the same hole diameter. However, the present invention is not limited thereto. In other embodiments, the aperture of the through hole on each copper-based lining plate is gradually increased from the bottom of the stainless steel cylinder to the direction of the open end. To better enhance the mixing effect of the refrigerant, as shown in fig. 11E, the liquid inlet pipe 6 may also be extended into the stainless steel cylinder 1, and the output end of the liquid inlet pipe 6 is closer to the cavity 20.

The setting of a plurality of reposition of redundant personnel branch pipe hole 11 makes the interval between two adjacent reposition of redundant personnel branch pipe holes 11 diminish, and when stainless steel cylinder body's bottom surface area was less, for avoiding reposition of redundant personnel copper branch pipe 3 to produce each other when follow-up assembly and interfere, in other this embodiments, still can set up each reposition of redundant personnel copper branch pipe 3 and all include straight tube section and bending section, the section of bending extends to the central direction of keeping away from stainless steel cylinder body, the free end and the outside pipeline of the section of bending assemble.

In this embodiment, as shown in fig. 1, the stainless steel end cap 4 covers the open end of the stainless steel cylinder 1. However, the present invention does not limit the way in which the stainless steel end cap and the stainless steel cylinder are assembled. In other embodiments, as shown in fig. 11A to 11C, the stainless steel end cap can also be sleeved on the open end of the stainless steel cylinder.

In the embodiment, as shown in fig. 5, the stainless end cap 4 is provided with a flanging portion 42 facing the outside of the cylinder in the circumferential direction of the liquid inlet pipe hole 41, and the liquid inlet pipe 6 is sleeved or sleeved in the flanging portion 42 and is welded with the flanging portion 42 in a sealing manner. However, the present invention is not limited thereto. In other embodiments, the cuff may also face the inside of the barrel, as shown in fig. 11B and 11C; at this time, the liquid inlet pipe is sleeved in the flanging part. Specifically, in the present embodiment, the stainless steel end cap 4 is formed by stamping a thin-walled stainless steel plate with a thickness less than 1mm to form the liquid inlet pipe hole 41, and then the thin-walled stainless steel plate is stretched and flanged to form the flange portion 42 and the end cap edge 43 sleeved on the stainless steel cylinder 1, wherein the height of the flange portion 42 ensures the welding depth between the liquid inlet pipe 6 and the liquid inlet pipe hole 41; the height of the end cap rim 43 ensures the welding depth between the stainless steel end cap 4 and the stainless steel cylinder 1.

In this embodiment, the liquid inlet pipe 6 is a liquid inlet copper pipe. However, the present invention is not limited thereto. In other embodiments, the liquid inlet pipe may also be a combination structure of a stainless steel pipe and a copper pipe, one end of the stainless steel pipe is sleeved on the liquid inlet pipe hole, and the other end is connected to the copper pipe.

In the present embodiment, the cross-sectional shape of the stainless steel cylinder 1 is circular; correspondingly, the stainless steel end cap 4 is also circular in cross-sectional shape. However, the present invention is not limited thereto. In other embodiments, the shape of the stainless steel cylinder satisfying the flow dividing structure is within the scope of the present invention, for example, the cross-sectional shape of the stainless steel cylinder may be any one of a square, an oval or a kidney.

On the other hand, the present embodiment further provides an air conditioner, as shown in fig. 12, which includes a throttling device 100 ', an evaporator 300 ', and the above-mentioned stainless steel liquid separator 200 ', wherein the liquid inlet pipe 6 of the stainless steel liquid separator is communicated with the throttling device 100 ', and the six branched copper pipes 3 of the stainless steel liquid separator are communicated with the evaporator 300 '. As shown in fig. 11, the air conditioner further includes a compressor 400 'and a condenser 500' connected between the evaporator 300 'and the throttle device 100'. In fig. 12, in the cooling state, the refrigerant circulates as indicated by arrows in the figure.

Example two

This embodiment is substantially the same as the first embodiment and its variations, except that: as shown in fig. 13 to 21, the present embodiment provides that the stainless steel liquid separator further includes a mixing baffle 5. Correspondingly, as shown in fig. 15 and 16, in this embodiment, the method for manufacturing the stainless steel liquid separator further includes an installation step S50' of the mixing baffle 5, which is as follows:

in step S10', a soft solder is put on the inner bottom surface of the integrally formed stainless steel cylindrical body 1 having an open single end. The soft solder can be tin-lead solder with melting point lower than 450 deg.C or lead-free solder. However, the present invention is not limited thereto.

Step S20', a copper-based lining plate 2 is pressed into the stainless steel cylinder 2;

step S30', fixing the pressed copper-based lining plate 2 and the stainless steel cylinder body 1 in a grooving mode;

step S40', the mixing baffle 5 is fixed to the stainless steel end cap 4. In the present embodiment, the mixing baffle 5 is integrally formed by stretching a stainless steel material, and the mixing baffle 5 is connected to the stainless steel end cap 4 by resistance welding. However, the present invention is not limited thereto. In other embodiments, other ways of fixing the hybrid baffle to the end cover are within the scope of the present invention, such as laser welding, argon arc welding, or self-fusion welding with filler wire; the fixing connection can also be carried out by mechanical fixing modes such as fasteners, riveting and the like. Or in other embodiments, the mixing baffle may also be fixed to the stainless steel cylinder or the copper-based lining plate, for example, the bottom of the mixing baffle is welded and fixed to the bottom of the stainless steel cylinder or the copper-based lining plate; likewise, other ways of securing the mixing baffle to the stainless steel cylinder or copper-based liner plate are within the scope of the present invention. Further, the invention is not limited in any way to the material of the mixing baffle. In other embodiments, the mixing baffle may also be made of red copper or copper alloy.

Step S50', the stainless end cap 4 connected with the mixing baffle 5 is sleeved and pressed on the open end of the stainless steel cylinder 1 and is sealed and welded, the two are sealed and connected to form an inner cavity of the liquid separator, and the mixing baffle 5 is located in the inner cavity of the liquid separator and divides the inner cavity of the liquid separator into a first mixing cavity 501 and a second mixing cavity 502.

Step S60', each shunt copper branch pipe 3 is pressed in the shunt branch pipe hole 11 at the bottom of the stainless steel cylinder 1 and extends into the corresponding lining plate hole 21; then, the solder between the copper-based backing plate 2 and the stainless steel cylinder 1 is melted by the heat of welding with the phosphor-copper solder, and a solder layer 103 is formed. However, the present invention is not limited thereto. In other embodiments, a silver-based solder may be used to solder the plurality of manifold copper legs.

Step S70', the liquid inlet pipe 6 is sleeved in the liquid inlet pipe hole 41 of the stainless steel end cover and brazed, and the output end of the liquid inlet pipe 6 is directly opposite to the first mixing chamber 501.

The stainless steel knockout that this embodiment provided realizes the intensive mixing of two-phase refrigerant through setting up mixing guide plate 5 to solve current knockout because of the inhomogeneous problem that arouses of two-phase refrigerant mixing of refrigerating system efficiency ratio. That is, the stainless steel liquid separator provided by the embodiment can greatly improve the performance of the product while reducing the manufacturing cost and simplifying the manufacturing process.

In this embodiment, the mixing baffle 5 is integrally formed after being stretched and is disposed in the inner cavity of the liquid separator formed after the stainless steel end cover 4 and the stainless steel cylinder 1 are hermetically welded. However, the invention is not limited in any way to the way in which the mixing baffle is shaped.

A first mixing cavity 501 is formed in the cavity part 52 of the mixing guide plate 5, a second mixing cavity 502 is formed between the mixing guide plate 5 and the copper-based lining plate 2, and a plurality of throttling guide holes 503 which are communicated with the first mixing cavity 501 and the second mixing cavity 502 are uniformly distributed on the mixing guide plate 5 along the circumferential direction. The liquid inlet pipe 6 is hermetically welded to the liquid inlet pipe hole 41 on the stainless steel end cap, and the output end of the liquid inlet pipe 6 faces the first mixing chamber 501. In this embodiment, the inner cavity of the liquid separator refers to an inner cavity formed by the stainless steel end cover 4, the side wall of the stainless steel cylinder 1 and the copper-based liner plate 2 after the stainless steel end cover 4 is hermetically welded to the open end of the stainless steel cylinder 1.

In the present embodiment, as shown in fig. 18A and 18B, the mixing baffle 5 includes a plate body 51 and a cavity 52 formed in the center of the plate body 51 and extending toward the bottom of the stainless steel cylinder 1, a first mixing chamber 501 is formed in the cavity 52, and a plurality of throttling baffle holes 503 are uniformly distributed along the circumferential direction of the plate body 51.

This embodiment provides a stainless steel liquid separator in which the mixing baffle 5, which is a component that provides two radially distributed mixing chambers for the refrigerant, is located within the interior of the liquid separator. As shown in fig. 17, the two-phase refrigerant of gas-liquid mixture output by the liquid inlet pipe 6 enters the first mixing chamber 501, and after being fully mixed, flows back along the first mixing chamber 501; then enters the second mixing cavity 502 from the throttling diversion hole 503 for secondary mixing. The two-mixing of the first mixing chamber 501 and the second mixing chamber 502 allows the two-phase refrigerants to be mixed well. Furthermore, the throttling guide hole 503 is arranged to realize the flow guiding communication between the first mixing cavity 501 and the second mixing cavity 502 and simultaneously realize the throttling of the two-phase refrigerant by using the reduced cross section of the throttling guide hole, and the gas phase of the two-phase refrigerant of gas-liquid mixture has higher speed than the liquid phase after throttling, so that the trend of breaking through the front liquid phase is presented, and the mixing uniformity of the refrigerant mixed in the second mixing cavity 502 is further improved.

Furthermore, the two mixing chambers are radially distributed, so that the refrigerant after primary mixing needs to flow back along the first mixing chamber 501 to reach the second mixing chamber 502 through the throttling and guiding hole 503, and the trend of the two-phase refrigerant is schematically shown by the arrow in fig. 16. This arrangement greatly extends the refrigerant path within the interior of the liquid separator, providing more room for mixing of the two-phase refrigerant. Specifically, the returned refrigerant reaches the throttle diversion hole 503 through a transmission passage 505 formed between the stainless end cover 4 and the plate body 51.

In the present embodiment, as shown in fig. 18A and 18B, the plurality of throttling guide holes 503 uniformly distributed along the circumferential direction of the mixing guide plate 5 are groove holes, and the groove holes are surrounded by the openings of the two curved stretching portions 53 located at both sides of the mixing guide plate 5 and having central symmetry. Specifically, the forming mode of the groove hole is as follows: firstly, punching a long and narrow through hole on a mixing guide plate 5, wherein the long and narrow through hole can be an elliptical hole with a smaller short radius or a rectangular hole with a smaller width; thereafter, the edges of the slit-shaped through-holes are stretched on both sides with reference to the mixture baffle 5, thereby forming two curved stretching portions 53 having central symmetry.

The two-phase refrigerants after primary mixing are subjected to radial flow guiding by the groove holes formed by the two curved surface stretching parts 53, so that the two-phase refrigerants passing through the throttling flow guiding hole 503 are dispersed towards the peripheral wall of the stainless steel cylinder 1 and are reflected back to the second mixing cavity 502 through the peripheral wall of the stainless steel cylinder 1, and the mixing effect of the two-phase refrigerants in the second mixing cavity 502 is greatly improved. Meanwhile, the radial flow guide of the groove hole greatly prolongs the mixing path of the two-phase refrigerant in the second mixing cavity 502, and ensures the uniform mixing of the two-phase refrigerant. Furthermore, the throttling diversion holes 503 of the groove hole structure conduct throttling on the two-phase refrigerant while conducting diversion in the radial direction, and the flow velocity of the two-phase refrigerant is increased. The combined action of throttling and radial diversion enables the two-phase refrigerant to form high-speed and uniform rotational flow in the area of the second mixing cavity 502 close to the throttling diversion hole 503, and gas and liquid phases in the refrigerant are fully mixed.

In the present embodiment, three sides of the curved surface stretching portion 53 except the opening are integrally connected to the mixing baffle 5, so that the connection strength is high and the rigidity is sufficient. Therefore, the curved stretching portion 53 does not generate noise due to vibration when the two-phase refrigerant passes through the throttle guide hole 503. However, the specific structure of the throttling guide hole is not limited in any way. In other embodiments, as shown in fig. 19A and 19B, the throttling diversion hole 503 may also be a through hole, which can simplify the processing procedure of the mixing diversion plate 5 and reduce the processing cost. Alternatively, in other embodiments, as shown in fig. 20A and 20B, the throttling guide hole may also be formed by a plurality of through holes 5031 and a plurality of groove holes 5032.

In this embodiment, the bottom of the cavity 52 is a flat surface. However, the bottom of the cavity 52 on the mixing baffle 5 may also be hemispherical.

In this embodiment, as shown in fig. 13, the output end of the liquid inlet pipe 6 extends into the first mixing chamber 501, and the distance D1 between the end surface of the output end of the liquid inlet pipe 6 and the end surface of the opening of the first mixing chamber 501 is less than or equal to 1 time of the outer diameter D of the liquid inlet pipe 6. The outlet end of the liquid inlet pipe 6 extends into the first mixing chamber 501, so that the two-phase refrigerant can completely enter the first mixing chamber 501. The distance D1 is set to ensure that there is enough space in the first mixing chamber 501 to achieve mixing of the refrigerant, improving the uniformity of mixing. Further, in this structure, a throttling gap 504 is formed between the extending portion of the liquid inlet pipe 6 and the first mixing chamber 501, and the refrigerant reaches the throttling guide hole 503 after being mixed in the first mixing chamber 501 with a large cross-sectional area and throttled by the throttling gap 504 with a small cross-sectional area. Preferably, the distance D1 between the end face of the outlet end of the liquid inlet pipe 6 and the end face of the opening of the first mixing chamber is set equal to 0.5 times the outer diameter D of the liquid inlet pipe 6. However, the present invention is not limited thereto. In other embodiments, the distance D1 between the output end surface of the liquid inlet pipe and the opening end surface of the first mixing chamber may be other values less than 1 times the outer diameter D of the liquid inlet pipe.

Alternatively, in other embodiments, as shown in fig. 21, the output end surface of the liquid inlet pipe 6 may also be located outside the first mixing chamber 501, and the distance D2 between the output end surface of the liquid inlet pipe 6 and the opening end surface of the first mixing chamber 501 is less than or equal to 0.8 times of the outer diameter D of the liquid inlet pipe. Preferably, the distance D2 between the output end surface of the liquid inlet pipe 6 and the opening end surface of the first mixing chamber 501 is equal to 0.5 times the outer diameter of the liquid inlet pipe. However, the present invention is not limited thereto.

In the stainless steel liquid separator provided by the embodiment, the mixing guide plate 5 forms two mixing cavities in the inner cavity of the liquid separator so as to realize the sufficient mixing of two-phase refrigerants, and the problem of poor energy efficiency ratio of a refrigeration system caused by uneven refrigerant mixing in the existing liquid separator structure is well solved.

On the other hand, the present embodiment further provides an air conditioner, the schematic diagram of the air conditioner provided in the present embodiment is the same as the first embodiment, and the air conditioner includes a throttling device 100 ', an evaporator 300 ', and the above-mentioned stainless steel liquid separator 200 ', a liquid inlet pipe 6 of the stainless steel liquid separator is communicated with the throttling device 100 ', and six branched copper pipes 3 of the stainless steel liquid separator are communicated with the evaporator 300 ', as shown in fig. 12; the difference is that the structure of the stainless steel liquid separator is different from that in the present embodiment, the refrigerant output by the throttling device 100 'is output to a mixing chamber 501 through the liquid inlet pipe 6, the refrigerant is mixed by the first mixing chamber 501 and then flows back, and is transmitted to the second mixing chamber 502 through the throttling and flow-guiding hole 503, and is output to the evaporator 300' through the six branch copper pipes 3 after being fully mixed. As shown in fig. 12, the air conditioner further includes a compressor 400 'and a condenser 500' connected between the evaporator 300 'and the throttle device 100'. In the cooling state, the refrigerant circulates as indicated by arrows in fig. 12.

EXAMPLE III

Because most of the existing air conditioner pipelines are copper pipes, the liquid inlet pipe can adopt a composite structure of a stainless steel pipe and a copper pipe (or a carbon steel pipe and a copper pipe) in order to facilitate the connection of the stainless steel liquid separator and an external copper pipe. During assembly welding: firstly, a stainless steel pipe and a copper pipe are brazed in a furnace to form a composite part; and secondly, performing flame brazing connection on the copper pipe end of the composite piece and the pipeline copper pipe. Two problems are encountered in the case of such welded connections: the stainless steel pipe and the copper pipe are brazed in a furnace, and tensile strength is reduced because metallographic structure crystal grains of the copper pipe are enlarged due to long-time furnace welding, so that the compressive strength of the whole pipeline can be directly reduced when the subsequent copper pipe is welded and connected with the pipeline copper pipe again. Secondly, when the composite part and the pipeline copper pipe are welded by flame brazing and heating, the brazing layer formed between the stainless steel pipe and the copper pipe can be heated by the welding heat for the second time, and the leakage of the product is easy to cause.

In view of the above, the present embodiment provides another stainless steel liquid separator. This embodiment is substantially the same as the first embodiment and its variations, except that: as shown in fig. 22 and 22A, in the present embodiment, the liquid inlet pipe 6 is a stainless steel pipe. The stainless steel knockout still includes copper sheathing connecting pipe 7, and copper sheathing connecting pipe 7 endotheca is connected in feed liquor pipe 6, and the pipeline copper pipe 10 in the external system pipeline endotheca is in copper sheathing connecting pipe 7. The length of a sleeving and overlapping area formed by the pipeline copper pipe 10, the copper sleeve connecting pipe 7 and the liquid inlet pipe 6 is L1, the sleeving and overlapping length of the pipeline copper pipe 10 and the copper sleeve connecting pipe 7 is L0, the sleeving and overlapping length of the copper sleeve connecting pipe 7 and the liquid inlet pipe 6 is L2, L1 is more than or equal to 0.2L0 and less than or equal to 0.8L0, and L1 is more than or equal to 0.2L2 and less than or equal to 0.8L 2.

The liquid distributor provided in this embodiment is also different from the first embodiment in the manufacturing process, and the differences are as follows: in this embodiment, the liquid inlet pipe is welded without the method of step S60 in the first embodiment. In this embodiment, the stainless steel end cap 4, the liquid inlet pipe 6 and the copper bush connecting pipe 7 are brazed in a furnace to form an integral piece, and then are connected to the stainless steel cylinder 1 by self-fusion welding in step S40, and finally the shunt copper branch pipe 3 is welded in step S50, and the solder between the copper-based liner plate 2 and the stainless steel cylinder 1 is melted by the welding heat, so that the solder layer 103 is formed therebetween.

Although the problem that the compressive strength is reduced when the pipe fitting is connected due to the fact that metallographic structure grains of the copper sleeve connecting pipe 7 are large and thick still exists after the copper sleeve connecting pipe 7 and the liquid inlet pipe 6 are brazed in the furnace, the liquid inlet pipe 6, the copper sleeve connecting pipe 7 and the pipeline copper pipe 10 are sequentially sleeved to form a sleeved overlapping area of which the length is L1, and the sleeved overlapping area L1 meets the following conditions: l1 is more than or equal to 0.2L0 and less than or equal to 0.8L0, and L1 is more than or equal to 0.2L2 and less than or equal to 0.8L 2. The test proves that: the outer part of the pipeline copper pipe 10 in the sleeving and overlapping area of the three parts with the length L1 meeting the size condition is provided with the copper sleeving connecting pipe 7 and the liquid inlet pipe 6, and the two outer walls are welded and reinforced in an overlapping mode, so that the compression strength is not reduced. Furthermore, the above size conditions also ensure that the pipeline copper pipe 10 only partially extends into the sleeving area of the copper sleeve connecting pipe 7 and the liquid inlet pipe 6, so that when the pipeline copper pipe 10 and the copper sleeve connecting pipe 7 are subjected to flame brazing, the brazing layer formed between the copper sleeve connecting pipe 7 and the liquid inlet pipe 6 is only partially affected, and the leakage problem caused by secondary fusion welding of the brazing layer is effectively avoided.

In the stainless steel knockout that this embodiment provided, the problem that the compressive strength that exists is low and secondary fusion welding causes leaks when the feed liquor pipe 6 of stainless steel and outside pipeline copper pipe welding has been solved well in the setting of copper sheathing connecting pipe 7, has improved the compressive strength and the security of stainless steel knockout and outside copper pipe greatly. Although the present embodiment is described by taking a stainless steel liquid inlet pipe as an example, the present invention is not limited thereto. In other embodiments, when the liquid inlet pipe is a carbon steel pipe, the welding structure provided by the embodiment is also applicable.

During assembly, in order to conveniently control the sleeving length L0 of the pipeline copper pipe 10 and the copper sleeve connecting pipe 7, an inward protruding sleeving limiting part can be arranged on the inner wall of the copper sleeve connecting pipe 7, and the sleeving limiting part limits the insertion depth of the pipeline copper pipe 10, so that the accurate control of the sleeving length L0 is realized. The sleeve joint limiting part can be any one of a plurality of point-shaped sleeve joint limiting parts, a multi-section arc sleeve joint limiting part or a circular ring sleeve joint limiting part.

As for the copper tubing 10, it may be a part of a stainless steel dispenser, i.e. the stainless steel dispenser contains copper tubing. Or, the stainless steel liquid separator does not include a copper pipe, which is a pipe fitting on an external air conditioning component, for example, in an air conditioner in a refrigeration state, the copper pipe 10 is an output pipe of the throttling device 100'.

Example four

In the present embodiment, when the liquid inlet pipe 6 is a copper pipe, as shown in fig. 23 and 23A, the stainless steel end cap 4 and the liquid inlet pipe 6 are brazed in the furnace to form an integral member, and then are connected to the stainless steel cylinder 1 by self-welding in step S40, and finally the shunt copper branch pipe 3 is welded in step S50, and the welding heat melts the solder between the copper-based liner plate 2 and the stainless steel cylinder 1, so that the solder layer 103 is formed therebetween, and finally the stainless steel dispenser is formed. When the stainless steel liquid separator is connected with an external pipeline, the pipeline copper pipe 10 is sleeved in the liquid inlet pipe 6.

As shown in fig. 23A, the liquid inlet pipe 6 is sleeved in the flanging part 42 on the end cover 4, so the copper pipe 10, the liquid inlet pipe 6 and the flanging part 42 form a sleeved overlapping region, the length of the sleeved overlapping region is L1 ', the sleeved length of the copper pipe 10 and the liquid inlet pipe 6 is L0 ', and the depth of the liquid inlet pipe 6 inserted into the flanging part 42 is L2 ', 0.2L0 ' is not less than L1 ' and not more than 0.8L0 ', and 0.2L2 ' is not less than L1 ' and not more than 0.8L2 '. The overlapping region formed by the pipeline copper pipe 10, the liquid inlet pipe 6 and the flanging part 42 enables the two layers of outer walls of the liquid inlet pipe 6 and the flanging part 42 to be overlapped, welded and reinforced outside the pipeline copper pipe 10, and the pipeline copper pipe is ensured to have enough compression strength. Furthermore, the L1' meeting the above size condition also enables the pipeline copper pipe 10 to only partially extend into the sleeving region of the liquid inlet pipe 6 and the flanging part 42, so when the pipeline copper pipe 10 and the liquid inlet pipe 6 are subjected to flame brazing, the brazing layer formed between the liquid inlet pipe 6 and the flanging part 42 is only partially affected, and the leakage problem caused by secondary fusion welding of the brazing layer is effectively avoided.

During the assembly, for the convenient control pipeline copper pipe 10 and the length L0 'of cup jointing of feed liquor pipe 6, can set up the spacing portion of cup jointing of inside bellied on the inner wall of feed liquor pipe 6, cup joint spacing portion and inject the depth of insertion of pipeline copper pipe 10 to the realization cup joints length L0's accurate control. The sleeve joint limiting part can be any one of a plurality of point-shaped sleeve joint limiting parts, a multi-section arc sleeve joint limiting part or a circular ring sleeve joint limiting part.

Likewise, for the tubing copper tube 10, it may be part of a stainless steel dispenser, i.e., the stainless steel dispenser contains tubing copper. Or, the stainless steel liquid separator does not include a copper pipe, which is a pipe fitting on an external air conditioning component, for example, in an air conditioner in a refrigeration state, the copper pipe 10 is an output pipe of the throttling device 100'.

In summary, the stainless steel liquid separator provided by the invention is of a combined structure, the cylinder body and the end cover are both made of stainless steel materials, and the stainless steel cylinder body is integrally formed by a stretching process with simple working procedures. Compare current copper knockout, this setting not only greatly reduced the material cost and the manufacturing cost of knockout, also greatly simplified manufacturing procedure simultaneously, improved machining efficiency. At least one copper-based lining plate arranged at the bottom of the stainless steel cylinder body provides enough insertion depth for welding the shunt copper branch pipe and the stainless steel cylinder body, and welding requirements are met. Further, before assembling the copper-based backing plate, solder is previously placed on the inner bottom surface of the stainless steel cylinder and melted by the heat of the divided copper branch pipe to form a solder layer filling the gap between the copper-based backing plate and the stainless steel cylinder. The welding tightness and the welding strength between the stainless steel cylinder and the shunt copper branch pipe are ensured by the arrangement, and a condition is provided for adopting low-cost phosphorus copper brazing between the stainless steel cylinder and the shunt copper branch pipe, so that the manufacturing cost of a product is further reduced.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A stainless steel dispenser, comprising:

the stainless steel cylinder body is integrally formed and is in a single-end open shape, and the bottom of the stainless steel cylinder body is provided with a plurality of shunt branch pipe holes;

the copper-based lining plates are arranged on the inner bottom surface of the stainless steel cylinder body, and each copper-based lining plate is provided with a plurality of lining plate holes corresponding to the shunt branch pipe holes;

the plurality of shunting copper branch pipes respectively extend into the shunting branch pipe holes, the extending ends of the shunting copper branch pipes extend into the corresponding lining plate holes, and the plurality of shunting copper branch pipes are hermetically welded in the corresponding shunting branch pipe holes and the corresponding lining plate holes by adopting phosphorus copper brazing filler metal or silver-based brazing filler metal;

the soft brazing material layer is formed in an assembly gap between the copper-based lining plate and the stainless steel cylinder body, and is formed by soft brazing materials which are placed between the inner bottom surface of the stainless steel cylinder body and the copper-based lining plate in advance and are melted by welding heat when the plurality of shunting copper branch pipes are welded;

and the stainless steel end cover is covered at the open end of the stainless steel cylinder body and is welded with the stainless steel cylinder body in a sealing way, and the stainless steel end cover is provided with a liquid inlet pipe hole.

2. The stainless steel liquid separator according to claim 1, further comprising a mixing guide plate, wherein the mixing guide plate is arranged in an inner cavity of the liquid separator formed by hermetically welding the stainless steel cylinder and the stainless steel end cap, the mixing guide plate is provided with a cavity part, a first mixing cavity is formed in the cavity part, a second mixing cavity is formed between the mixing guide plate and the copper-based lining plate, and a plurality of throttling guide holes communicating the first mixing cavity and the second mixing cavity are uniformly distributed on the mixing guide plate along the circumferential direction; the concave cavity part enables two-phase refrigerant entering the first mixing cavity to flow back along the first mixing cavity after being mixed, then the refrigerant reaches the second mixing cavity through the throttling and flow guiding hole, and the liquid inlet pipe hole on the stainless steel end cover is opposite to the first mixing cavity.

3. The stainless steel liquid separator according to claim 2, further comprising a liquid inlet pipe welded to the hole of the liquid inlet pipe, wherein the output end of the liquid inlet pipe extends into the first mixing chamber, and the distance between the end surface of the output end of the liquid inlet pipe and the end surface of the opening of the first mixing chamber is less than or equal to 1 time of the outer diameter of the liquid inlet pipe; or the output end face of the liquid inlet pipe is positioned outside the first mixing cavity, and the distance between the output end face of the liquid inlet pipe and the opening end face of the first mixing cavity is less than or equal to 0.8 times of the outer diameter of the liquid inlet pipe.

4. The stainless steel liquid separator according to claim 3, wherein when the liquid inlet pipe is a stainless steel pipe or a carbon steel pipe, the stainless steel liquid separator further comprises a copper sleeve connecting pipe sleeved at the end of the liquid inlet pipe, the copper sleeve connecting pipe is sleeved in the copper sleeve connecting pipe, the length of a sleeved overlapping area formed by the copper pipe, the copper sleeve connecting pipe and the liquid inlet pipe is L1, the sleeved length of the copper pipe and the copper sleeve connecting pipe is L0, the sleeved length of the copper sleeve connecting pipe and the liquid inlet pipe is L2, the sleeved length of 0.2L0 is not less than L1 and not more than 0.8L0, and the sleeved length of 0.2L2 is not less than L1 and not more than 0.8L 2.

5. The stainless steel liquid separator according to claim 3, wherein when the liquid inlet pipe is a copper pipe, the liquid inlet pipe is sleeved in the flanging part at the periphery of the liquid inlet pipe hole, the pipeline copper pipe is sleeved in the liquid inlet pipe, the length of a sleeved overlapping area formed by the pipeline copper pipe, the liquid inlet pipe and the flanging part is L1 ', the sleeved length of the pipeline copper pipe and the liquid inlet pipe is L0 ', and the sleeved length of the liquid inlet pipe and the flanging part is L2 ', 0.2L0 ' is less than or equal to L1 ' is less than or equal to 0.8L0 ', and 0.2L2 ' is less than or equal to L1 ' is less than or equal to 0.8L2 '.

6. The stainless steel liquid separator according to claim 2, wherein the plurality of throttling guide holes uniformly distributed along the circumferential direction of the mixing guide plate are groove holes, through holes or a combination of through holes and groove holes; the groove hole is formed by the surrounding of the openings of two curved surface stretching parts which are positioned at the two sides of the mixing guide plate and are centrosymmetric.

7. The stainless steel liquid separator according to claim 2, wherein the mixing guide plate comprises a plate body and a cavity part formed in the center of the plate body and extending towards the bottom of the stainless steel cylinder body, a first mixing cavity is formed in the cavity part, and a transmission channel is formed between the plate body and the end cover.

8. The stainless steel liquid separator according to claim 1, wherein the inner side wall of the stainless steel cylinder is provided with a limiting fixing part protruding towards the inside of the stainless steel cylinder, the limiting fixing part limits and fixes the copper-based lining plate on the inner bottom surface of the stainless steel cylinder, and the limiting fixing part comprises a plurality of point-shaped limiting fixing parts, a plurality of sections of circular arc limiting fixing parts or a circular ring limiting fixing part; or at least one copper-based lining plate is assembled on the inner bottom surface of the stainless steel cylinder body in an interference manner.

9. The stainless steel liquid separator according to claim 1, wherein the copper-based lining plate further has a through hole and the through hole is located in a circumferential center line formed by the plurality of lining plate holes; when the number of the copper-based lining plates is multiple, the copper-based lining plates are overlapped on the inner bottom surface of the stainless steel cylinder body, and the through holes on the copper-based lining plates are correspondingly overlapped to form a concave cavity.

10. The stainless steel liquid distributor according to claim 1, wherein the stainless steel end cap outer sleeve or inner sleeve covers the open end of the stainless steel cylinder, and the joint of the two is sealed and welded to form the inner cavity of the liquid distributor; the stainless steel end cover is provided with a flanging part facing the inside or the outside of the stainless steel cylinder body in the circumferential direction of the liquid inlet pipe hole.

11. An air conditioner, comprising a throttling device, an evaporator and the stainless steel liquid separator as claimed in any one of claims 1 to 10, wherein a liquid inlet pipe hole of the stainless steel liquid separator is communicated with the throttling device, and a plurality of branch pipes of the stainless steel liquid separator are communicated with the evaporator.

12. The manufacturing method of the stainless steel knockout is characterized in that the stainless steel knockout comprises a stainless steel cylinder body, at least one copper-based lining plate, a plurality of shunt copper branch pipes and a stainless steel end cover; the manufacturing method of the stainless steel liquid distributor comprises the following steps:

step S20, at least one copper-based lining plate is pressed into the stainless steel cylinder, and each copper-based lining plate is provided with a plurality of lining plate holes corresponding to the plurality of shunt branch pipe holes;

step S30, fixing at least one copper-based lining plate and a stainless steel cylinder in a dotting or grooving mode;

13. A manufacturing method of a stainless steel knockout is characterized in that the stainless steel knockout comprises a stainless steel cylinder body, at least one copper-based lining plate, a plurality of shunting copper branch pipes, a stainless steel end cover and a mixing guide plate; the manufacturing method of the stainless steel liquid distributor comprises the following steps:

step S50', sleeving and pressing a stainless steel end cover on the open end of a stainless steel cylinder and sealing and welding the stainless steel end cover and the open end of the stainless steel cylinder, forming an inner cavity of the liquid distributor after the stainless steel end cover and the open end of the stainless steel cylinder are sealed and welded, and dividing the inner cavity of the liquid distributor into a first mixing cavity and a second mixing cavity by a mixing guide plate which is positioned in the inner cavity of the liquid distributor;